eqaddictedfool

Well just got back from a dyno down here in southern Florida. my 2009 cobalt ss' Current mods are GMS1, K&N Intake, MPX lightweight pulley, Catess downpipe, and Devils Own Meth injection kit.

drum roll pls

191 WHP. Yes you read that right folks. After 3 pulls in 3rd gear up to 6,500 RPMs and 22PSI. I came in with an amazing 191 HP with 275 LBs of torque. According to the Dyno I am running way to lean and is entering limp mode. His reccomendation is an HP tune for 400 bucks. So what do you guys think about that?

MastaShaKe_88

iTrader: (5)

holy ****... how lean are you runnin??? I think gms1 shoulda put you around 260-270whp

Slowbalt2000

iTrader: (1)

what are your afrs?

09CobaltSS1

The gms1 does run a bit on the lean side but something isn't right here. Either the guy running the dyno is totally sandbagging you into buying a tune from him, or something is mechanically wrong with the car.

Post your dyno graph if you can.

cmiller8006

iTrader: (3)

Yea we need more info here. If you have no other tuning and just a gms1 the. You should be just fine. Unless of coarse you went to someone that knows nothing ofthe di in these cars and thinks 12.8-13.0 is lean. Get rid of that lightweight pulley as well. Next step would be going to a different dyno/tuner.

theamericanautos

iTrader: (1)

I dyno'ed with GMS1 and K&N SRI. 3 runs and best hp run was 220 whp and 219 lb.ft. and best torque run was 216 whp and 233 lb.ft. the guy told me something is wrong and suggested a plugged cat but the car seems to run fine and the cat wasn't plugged. the first graph was a little rough but the second two look perfectly fine. I would make sure nothing is wrong with the car and if everything checks out and your fuel trims are good, I wouldn't be too concerned.

AARON-SS-TC

iTrader: (3)

i completely agree...with those numbers you would notice that it was a pig and not running right...looks like you need a new dyno, then we will see.

can u run meth with a gms1 though?

09CobaltSS1

Ehh meth is kinda pointless without a tune. It will lower you iat's but there's really not much of a point with just a gms1. Hopefully the op can post a dyno graph though.

eqaddictedfool

I get home alot later so will try and post tomorrow morning. This was part of a Dyno day my buddy with an srt 4 calibur was pulling 280 whp.

peachpuff

Sounds like you need a retune... https://www.cobaltss.net/forums/2-0l...ro-not-277862/

AARON-SS-TC

iTrader: (3)

well, have u raced your buddy?
that should be an easy gauge for ya to know if your car is running properly. if he is blowin you away, then your car is broke because you should be able to beat him.

nhanson

iTrader: (1)

You know FOR SURE if it was limp mode...basically runs on 2 cyls

eqaddictedfool

I have raced him though not any time recently. Did go to the track the nigh before however. best was a 9.5 in the 1/8

Cobalt_Daddy

^^^ this. dyno's are hit and miss. i dyno'd 268whp and 291wtq with just gms1 and nothing else.

when i was stock i dyno'd 221whp and 219wtq.

eqaddictedfool

Thanks for the read btw peach. Something to absolutely consider in this situation though i wonder where to begin with it. Guess i should post those dynos before anything

Zander916

If it seems to run fine and you think it pulls good. (better than stock) I have to believe it's the dyno. There shouldn't be anything fishy with the tune. It's not like you had some joe blow tune it. It's a GMS1.
No codes? No messages displayed?

I'm going to run meth/water but purely just as a safety net. I won't spray too much. I'm seeing (calculated) EGT's greater than 1,800 if I stay on it for long. I just want to cool it down a bit.

eqaddictedfool

no cels or anything as far as i knew i was just fine until he handed me those numbers.

FRQ FLYR

iTrader: (1)

Was ESC disabled? I think leaving it on can skew results.

AARON-SS-TC

iTrader: (3)

thats good right there^^^sometimes the easy stuff gets looked over. i think most peoples car goes in shutdown mode though with it on.

09CobaltSS1

Yeah that's a good point too actually. I can see someone easily overlooking this and not setting the stability control settings into esc off.

jonathan923

iTrader: (2)

damm stock lsj's dyno higher than that. i dont get it i thought stock lnfs where in the 240whp stock. whats weird is that long ago when i was stock i ran a stock lnf and its was a even race till we let off at about 120mph. anyways sorry for the threadjack op hope you get ur numbers fixed.

07LSJ

iTrader: (5)

you didnt notice your car went into limp mode? its pretty obvious when it does lol drives like shiiiit

user 72239

iTrader: (4)

damn thats horrible. something is wrong.

My car dyno'd 269 whp with just an intake and charge pipe

Cobalt_Daddy

if you leave esc on when dynoing, the car starts to cut out and run like **** and it's very obvious there is a problem... ask me how i know haha so i doubt this is the OP's problem.

N1ckateen

iTrader: (1)

chevycobaltss3 tune. thread/